Requirements for Unity of Application - Japan Patent Office

[Example 19]
[Title of the Invention]
Ceramic material and process of dissolving the core made of said material
[Claims]
1. A means of dissolving a ceramic material from an article vulnerable to attack by a caustic
alkaline solution, characterized in that a substance containing hydrogen donors in the
ceramic material is included, and the ceramic material is immersed in anhydrous caustic
alkaline solution.
2. A means of dissolving a core made of a ceramic material of a light metal or a light alloy
casting, wherein a light metal or a light alloy casting having a core consisting of a ceramic material
including a substance with the hydrogen donors is contacted to anhydrous caustic alkali to be
immersed in the anhydrous caustic alkali melted by the heat of a casting before said the
casting gets cold.
[Excerpt from Detailed Description of the Invention]
This invention relates to the process of dissolving a ceramic material and the core made of
said material of an article that is vulnerable to attack by a caustic alkaline solution.
Although the core made from a ceramic material of the alloy casting is mainly manufactured
from nickel, and cobalt is fundamentally dissolved and extruded in a caustic alkaline solution,
this process cannot be applied to light metals or light alloy castings because they are impinged
on by a caustic alkaline solution. By making a ceramic material containing hydrogen donors, the
present invention has made it possible to dissolve just a ceramic material selectively without
light metals or light alloy castings being impinged on in the anhydrous alkaline solution.
Furthermore, to “bring the casting into contact with an anhydrous alkali before the casting cools
down”, as described in Claim 2, aims at dissolving the anhydrous alkali by making use of the
heat from a casting.
[Explanation]
The technical field of the specified invention (Claim 1) is “dissolving a ceramic material in an
article which is vulnerable to attack by a caustic alkali solution “, whereas that of the related
invention (Claim 2) is “dissolving the core made of a ceramics material of a light metal or a light
alloy casting”. Light metals or light alloys are vulnerable to attack by a caustic alkali solution, and
it is highly appropriate that the technology of the specified invention should be applied to the
dissolution of the core, which is made of a ceramic material, of said casting of the materials.
Therefore, the technical fields of both inventions are technically and directly associated with
each other and the industrial fields of application of the inventions are also the same.
On the other hand, the new matter corresponding to the problems to be solved of the
specified invention, i.e. to “make a ceramic material include the substance containing hydrogen
donors and make a ceramic material immerse in the anhydrous caustic alkaline solution”, is
equivalent to the substantial part of the matters in the claim of the related invention. Therefore,
the substantial parts of matters in the claims of the two inventions are the same.
[Concerned Section]
Patent Law Section 37(ii)
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